A reduction of 21% in the price of pulse enables a person to by 10.5 kg more for Tk. 100. How much is reduced per kg of pulse?

A reduction of 21% in the price of pulse enables a person to by 10.5 kg more for Tk. 100. How much is reduced per kg of pulse? Correct Answer Tk 2

ধরি, original দাম = x Tk per kg reduced দাম = 79x/100 Tk per kg তাহলে, 100/(79x/100) - 100/x = 10.5 10000 - 7900 = 10.5 × 79x x = 2100/(10.5×79) তাহলে, required price = 79/100×2100/(10.5×79) = 2 Tk per kg
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